OP AMP INTEGRATOR CIRCUIT DESIGN AND WORKING
The OP AMP Integrator, is a circuit which performs the integration of an input signal. The output of an integrator will be the mathematical integral value of continuous input signal. Such a circuit is obtained by using a basic inverting amplifier configuration if the feedback resistor Rf is replaced by a capacitor Cf.
Vo = -1/R1CF ∫0T(Vin dt + C)
The above equation shows that the output voltage is directly proportional to the negative integral of input voltage and inversely proportional to the time constant R1Cf.
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